Figure A-1 depicted a two-room campus cluster using Sun StorEdge T3 partner groups and four Fibre Channel switches. Figure A-4 shows the same setup with four additional switches for greater redundancy and potentially better I/O throughput.
Figure A-5 is similar to Figure A-1, except that it uses Sun StorEdge T3/T3+ arrays in single-controller configurations, rather than partner-groups.
Figure A-6 depicts a two-room campus cluster using Sun StorEdge A5x00s. Note the absence of switches.